Answer:
Jaon have $18 and Anne's have $25.
Explanation:
Let Anne's amount is a.
Joan's amount, j = a-7 ...(1)
Together they have $43.
a+j = 43 ...(2)
Put the value of j from (1) in (2).
a+a-7= 43
2a = 43+7
2x = 50
a = 25
Anne's amount = $25
Joan's amount = 25 -7 = $18
Hence, Jaon have $18 and Anne's have $25.